Observation of an underlying relativistic effect in the valence bands of Pt

An alternative model for electron correlation in Pu

“…It is shown that by combining the spin-and orbital-specific Density of States (DOS) with state, spin and polarization specific transition moments [7], one can reconstruct the experimentally observed spectra from Pu, obtained with linearly polarized soft xrays, [8] thus directly confirming the validity of this approach. (Figure 1) Furthermore, by extrapolating to a spin-resolving Fano experiment performed in a chiral configuration with a non-magnetic sample [7,9,10], it is predicted what the spectral response of Pu should be and how this would be different that that expected for a Kondo shielded system. [9] The spectral modeling for the extrapolation was tested using the non-magnetic and highly relativistic system Pt.…”

Resolving the Pu electronic structure enigma: Past lessons and future directions

“…Recent experiments upon Ce [14] and Pt [15] each indicate the utility of using the Fano effect as a way to provide additional spectral structure in Pu [16]. In Fano Spectroscopy, a spin resolved PES [17,18] experiment is performed upon a 'non-magnetic' sample using chirally polarized excitation.…”

“…The instrumental contribution in the Pu XAS measurements was 0.1 eV, which is insignificant when compared to the observed line-widths. [15]. Spin resolved photoemission spectra obtained with unpolarized He I(hv = 21.2 eV) light for normal emission from the valence bands of Pt(001).…”

Photoelectron Spectroscopy of U Oxide at LLNL

“…The experiments were carried out onsite at Lawrence Livermore National Laboratory, using a spectrometer [5] with capabilities for performing both spin resolved Fano spectroscopy [6,7] and high energy Inverse Photoelectron Spectroscopy (IPES) or Bremstrahlung Isochromat Spectroscopy (BIS). [10] The PES spectra were collected using a Specs x-ray source for the excitation and the Specs photoelectron energy analyzer for electron detection.…”

“…[3,4] To this end, we have constructed and commissioned a new Fano Spectrometer, [5] testing it with the relativistic 5d system Pt. [6,7] Here, our preliminary photoelectron spectra of the UO 2 system are presented.…”